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| rev | Admin | (Created page with "'''Solution: E''' We need to calculate the probability that a normal random variable with mean 270 and standard deviation 10 lies outside the range [240,290]. This is equivalent to finding the probability that a standard normal variable <math>Z</math> lies outside the range [-3,2]. We have <math>P(Z <-3) = 0.001345 </math> and <math>P(Z > 2) = 0.02275</math>. Adding these probabilities gives 0.024095.") | Jun 26'24 at 22:57 | +406 |